Yuck! Kill them all and let God sort it out. That's what I say anyway.

Did it have two little pom-pom looking things in front? If so, it's a male hobo, which is the kind likely to show up inside. If not, probably not. Also, they don't usually show up in houses until fall -- Sept. or early Oct., when the males go on the hunt for girlfriends. Who will eat them. I effing hate spiders.